DEVICE FOR COMPENSATION OF ERRORS OF MEASURING CHANNEL Russian patent published in 1994 - IPC

FIELD: automatics. SUBSTANCE: device has pickup 1 of measured quantity, controlled former 2 of harmonic signals of calibration amplitudes, first 3, second 4 and third 5 adders, measuring channel 6, first 7, second 8 and third 9 filters, second 10, first 11, third 12, fifth 13 and fourth 14 subtracters, average value subtracter 15, voltage control unit 16, former 17 of signals of calibration voltages, divider 18, multiplier 19, inverter 20. Device makes it possible to determine error of measuring channel on the basis of piecewise-linear approximation of conversion function and subtract it out of legitimate signal , where y_a, y_b are values of signal across outputs of corresponding filters; are error input by measuring channel when standard signals with amplitudes a and b pass through it. EFFECT: enhanced accuracy of compensation of errors of measuring channel caused by nonlinear measurements of its transfer characteristic. 4 dwg